Скачать или смотреть Faults and it’s types in Power System

A fault in an electric power system can be defined as , any abnormal condition of the system that involves the electrical failure of the equipment, such as , transformers, generators, busbars, etc.

In 3-phase ac power circuits, the short circuit faults can be classed as follows:

1. Single phase to ground (L-G) — due to breakdown of insulation between one of the phases and earth.

2. Phase to phase (L-L) — due to breakdown of insulation between either of the two phases.

3. Two phases to ground (L-L-G) — due to breakdown of insulation between two phases and earth.

4. Phase to phase and third phase to ground — a combination of faults given at no. 1 and 2 i.e., due to breakdown of insulation between two phases and simultaneous breakdown of insulation between the third phase and earth.

5. All the three phases to ground (L-L-L-G) — due to breakdown of insulation between all the phases as well as to earth.

6. All the 3-phases short circuited (L-L-L) — due to breakdown of insulation between all the three phases.


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